Sennheiser manual HDC 55 NoiseGard, Compensation

HDC 55 NoiseGard™

Products for Industry Stereo Headphones with NoiseGard™ Active Noise

Cat. No. 004860	HDC 55-16
Cat. No. 004859	HDC 55-26
Cat. No. 005222	HDC 551-16-0

General Description

Compensation

Cat. No. 005223 HDC 551-26-0

First class stereo headphones with NoiseGard™ active noise compensation of up to approx. 10 dB. The HDC 55/HDC 551 NoiseGard™ headphones are small, light, robust and comfortable to wear. The ear pads can easily be changed, and the headphones can be supplied with any company logo printed on them (from 500 pieces).

Features

Light

Compact design

Swivelling earpieces

Robust

Replaceable ear pads

Excellent frequency response

HDC 551 with in-line battery pack

￿Company logo option

Recommended Accessories
Hygiene pads	Cat. No. 081452
Product Variants
HDC 55-26, 3 Klinkenstecker: 2.5 + Doppel 3.5	Cat. No. 004859
HDC 55-16, seat powered, 2.5 mm Klinke + 3.5 mm
￿stereo jack (=Doppelstecker)	Cat. No. 004860
HDC 551-16-0, battery powered	Cat. No. 005222
￿HDC 551-26-0, battery powered	Cat. No. 005223

Technical Data
Frequency response	.................................................				20 – 18,000 Hz
Transducer principle	..................................................				dynamic, open
Nominal impedance	.................................................................				270 Ω
THD			< 1 %
Active noise compensation			..........................................		10 dB ± 3 dB
					(between 300 – 900 Hz)
Operating voltage
HDC 55-16/-26					11 – 16 V DC, typ. 7 mA
HDC 551					2 x AA size battery
Operating time					approx. 60 h
Ear coupling					supra-aural
Contact pressure					approx. 1.6 N
Weight (without cable)					approx. 115 g
Connection cable					1.4 m, dual-sided
Connectors
HDC 55-26		special right angled 3-pin connector,
2.5 mm jack and 3.5 mm double mono jack,
				seat powering (ARiNC type C2)
HDC 55-16		special right angled 2-pin connector,
		2.5 mm jack and 3.5 mm stereo jack,
				seat powering (ARiNC type C1)
HDC 551-16-0				3.5 mm right-angled stereo jack,
			battery powering (ARiNC type A1)
HDC 551-26-0	right-angled 3.5 mm double mono jack,
			battery powering (ARiNC type A2)

2-pin special connector 3-pin special connector